PD

I have some Partner parts and I'm wondering if they are compatible. Can someone please tell me if these will work together. I found all these parts in one of my storage rooms and figured it wont hurt to try to learn this thing! Here is what I have:

5-slot cabinet
ACS Proc. R4.0
Partner Mail VS R5.0
2 - 206 Module R2.0
1 - 400E Module R3.1

I also have two phones....Partner 34D..?..?

Any help would be appreciated!

Thanks!